KCET · BIOLOGY · STD 12 - 2. Human Reproduction

Vitellogenesis occurs during the formation of

A ootid in the Fallopian tube
B secondary oocyte in the Fallopian tube
C primary oocyte in the Graafian follicle
D oogonial cell in the Graafian follicle

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Answer & Solution

Correct Answer

(C) primary oocyte in the Graafian follicle

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Detailed explanation

(C) primary oocyte in the Graafian follicle,
Vitellogenesis, the process of yolk formation and deposition, occurs in the primary oocyte within the Graafian follicle during oogenesis in the ovary. This stage involves the accumulation of yolk, which includes proteins, fats, phospholipids, carbohydrates, and glycogen, essential for embryo development.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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List I (Pigments)	List II (Colour in chromatogram)
1. Chlorophyll 'b'	p. Yellow orange
2 Carotenoids	q. Orange red
3. Chlorophyll 'a'	r. Yellow
4. Xanthophylls	s.Blue green
	t. Yellow green